A U.S. Secret Service officer who was fired after investigators said he sexted with underage girls while on duty at the White House has been moved to South Florida to face criminal charges.

Lee Robert Moore, 38, made his first appearance Tuesday in federal court in West Palm Beach on allegations he tried to lure a Broward County girl into sexual activity.

Few details have been revealed about the allegations in the South Florida case. Moore was indicted on three federal charges of attempted production of child pornography, attempted receipt of child pornography and using a computer to persuade, entice or coerce a minor to engage in sexual activity between January and May 2014.

Moore, who worked as a uniformed Secret Service officer based at the White House, has been locked up since he was arrested in November on a related federal charge in Delaware.

Moore "sought to use mobile technology to sexually exploit multiple minor, teenage girls from one of the most secure places on the planet. He did so while in the presence of other highly trained law enforcement officers and just yards from the President of the United States, his family, and senior administration officials he was then protecting. ... The brazen and self-absorbed nature of his conduct is simply breathtaking," federal prosecutors wrote.

Sun Sentinel / Federal court records

Lee Robert Moore, 38, a U.S. Secret Service officer who worked at the White House, is facing federal charges of inappropriate sexual contact with a 16-year-old girl from Broward County. Prosecutors said this "selfie" is a still image from a video he took of himself - in uniform and on-duty at the White House complex - and sent it to at least one of the alleged victims.

Lee Robert Moore, 38, a U.S. Secret Service officer who worked at the White House, is facing federal charges of inappropriate sexual contact with a 16-year-old girl from Broward County. Prosecutors said this "selfie" is a still image from a video he took of himself - in uniform and on-duty at the White House complex - and sent it to at least one of the alleged victims.

(Sun Sentinel / Federal court records)

Moore was recently moved to the Palm Beach County Jail after the Federal Public Defender's Office, which represents him, announced that he wanted to face the most serious allegations against him first in Florida.

"The charges brought against Mr. Moore in the Southern District of Florida are much more serious than the charge pending against Mr. Moore in the District of Delaware. Mr. Moore would like to resolve his case in the Southern District of Florida prior to resolving the case pending against him in the District of Delaware," his lawyers wrote.

Delaware Department of Justice via AP

Lee Robert Moore, 38, a Secret Service officer from Maryland, has been moved to South Florida to face federal charges linked to child pornography and trying to entice an underage girl from Broward County to engage in sexual activity. Investigators said he sent obscene images and texts to individuals he thought were underage girls, sometimes while on duty at the White House.

Lee Robert Moore, 38, a Secret Service officer from Maryland, has been moved to South Florida to face federal charges linked to child pornography and trying to entice an underage girl from Broward County to engage in sexual activity. Investigators said he sent obscene images and texts to individuals he thought were underage girls, sometimes while on duty at the White House.

(Delaware Department of Justice via AP)

Moore, who now has a beard, was dressed in dark blue jail scrubs and was handcuffed and shackled during his brief court appearance Tuesday. He spoke only briefly with U.S. Magistrate Judge Dave Brannon and is expected to remain locked up while both federal cases are pending. No trial dates have been scheduled yet.

Investigators said Moore, who is married with children and lived in Maryland before his arrest, was communicating with at least two undercover officers and at least two minors, according to court records in the Delaware case. When he was questioned, investigators said Moore estimated he was talking to about 10 individuals he believed were underage girls.

Federal prosecutors in Delaware said Moore, whose duties included guarding the White House, frequently engaged in online sex chats while he was supposed to be working.

Investigators said that, in one chat, Moore asked an undercover officer he thought was a 14-year-old girl to send him something "exciting" because "work sucks today." He was checking IDs for people entering the White House complex that day, according to court records.

In another online conversation, he sent a photograph of his penis to one of the undercover officers who was posing as a teenage girl, according to court records. In another, he sent a non-explicit video of himself in uniform from the White House, authorities said.

Moore also destroyed digital evidence of his misconduct after he found out he was under investigation and was about to be arrested, according to federal prosecutors and agents from Homeland Security Investigations.

He learned of the investigation when officials from the Secret Service went to his home and told him he was being suspended, in violation of how prosecutors and investigators had asked the Secret Service to handle the matter, according to court documents.

His arrest was one of a series of recent embarrassments for the Secret Service, starting in 2012, when more than a dozen agents and officers were accused of hiring prostitutes during a presidential trip to South America.